/**
 * @file lv_flex.h
 *
 */

#ifndef LV_FLEX_H
#define LV_FLEX_H

#ifdef __cplusplus
extern "C" {
#endif

    /*********************
     *      INCLUDES
     *********************/
#include "../../../core/lv_obj.h"
#if LV_USE_FLEX

     /*********************
      *      DEFINES
      *********************/

#define LV_OBJ_FLAG_FLEX_IN_NEW_TRACK   LV_OBJ_FLAG_LAYOUT_1
    LV_EXPORT_CONST_INT(LV_OBJ_FLAG_FLEX_IN_NEW_TRACK);

#define _LV_FLEX_COLUMN        (1 << 0)
#define _LV_FLEX_WRAP       (1 << 2)
#define _LV_FLEX_REVERSE    (1 << 3)

    /**********************
     *      TYPEDEFS
     **********************/

     /*Can't include lv_obj.h because it includes this header file*/
    struct _lv_obj_t;

    typedef enum {
        LV_FLEX_ALIGN_START,
        LV_FLEX_ALIGN_END,
        LV_FLEX_ALIGN_CENTER,
        LV_FLEX_ALIGN_SPACE_EVENLY,
        LV_FLEX_ALIGN_SPACE_AROUND,
        LV_FLEX_ALIGN_SPACE_BETWEEN,
    } lv_flex_align_t;

    typedef enum {
        LV_FLEX_FLOW_ROW = 0x00,
        LV_FLEX_FLOW_COLUMN = _LV_FLEX_COLUMN,
        LV_FLEX_FLOW_ROW_WRAP = LV_FLEX_FLOW_ROW | _LV_FLEX_WRAP,
        LV_FLEX_FLOW_ROW_REVERSE = LV_FLEX_FLOW_ROW | _LV_FLEX_REVERSE,
        LV_FLEX_FLOW_ROW_WRAP_REVERSE = LV_FLEX_FLOW_ROW | _LV_FLEX_WRAP | _LV_FLEX_REVERSE,
        LV_FLEX_FLOW_COLUMN_WRAP = LV_FLEX_FLOW_COLUMN | _LV_FLEX_WRAP,
        LV_FLEX_FLOW_COLUMN_REVERSE = LV_FLEX_FLOW_COLUMN | _LV_FLEX_REVERSE,
        LV_FLEX_FLOW_COLUMN_WRAP_REVERSE = LV_FLEX_FLOW_COLUMN | _LV_FLEX_WRAP | _LV_FLEX_REVERSE,
    } lv_flex_flow_t;

    /**********************
     * GLOBAL VARIABLES
     **********************/
    extern uint16_t LV_LAYOUT_FLEX;
    extern lv_style_prop_t LV_STYLE_FLEX_FLOW;
    extern lv_style_prop_t LV_STYLE_FLEX_MAIN_PLACE;
    extern lv_style_prop_t LV_STYLE_FLEX_CROSS_PLACE;
    extern lv_style_prop_t LV_STYLE_FLEX_TRACK_PLACE;
    extern lv_style_prop_t LV_STYLE_FLEX_GROW;

    /**********************
     * GLOBAL PROTOTYPES
     **********************/

     /**
      * Initialize a flex layout the default values
      * @param flex pointer to a flex layout descriptor
      */
    void lv_flex_init(void);

    /**
     * Set hot the item should flow
     * @param flex pointer to a flex layout descriptor
     * @param flow an element of `lv_flex_flow_t`.
     */
    void lv_obj_set_flex_flow(lv_obj_t* obj, lv_flex_flow_t flow);

    /**
     * Set how to place (where to align) the items and tracks
     * @param flex pointer: to a flex layout descriptor
     * @param main_place where to place the items on main axis (in their track). Any value of `lv_flex_align_t`.
     * @param cross_place where to place the item in their track on the cross axis. `LV_FLEX_ALIGN_START/END/CENTER`
     * @param track_place where to place the tracks in the cross direction. Any value of `lv_flex_align_t`.
     */
    void lv_obj_set_flex_align(lv_obj_t* obj, lv_flex_align_t main_place, lv_flex_align_t cross_place,
        lv_flex_align_t track_cross_place);

    /**
     * Sets the width or height (on main axis) to grow the object in order fill the free space
     * @param obj pointer to an object. The parent must have flex layout else nothing will happen.
     * @param grow a value to set how much free space to take proportionally to other growing items.
     */
    void lv_obj_set_flex_grow(lv_obj_t* obj, uint8_t grow);

    void lv_style_set_flex_flow(lv_style_t* style, lv_flex_flow_t value);
    void lv_style_set_flex_main_place(lv_style_t* style, lv_flex_align_t value);
    void lv_style_set_flex_cross_place(lv_style_t* style, lv_flex_align_t value);
    void lv_style_set_flex_track_place(lv_style_t* style, lv_flex_align_t value);
    void lv_style_set_flex_grow(lv_style_t* style, uint8_t value);
    void lv_obj_set_style_flex_flow(lv_obj_t* obj, lv_flex_flow_t value, lv_style_selector_t selector);
    void lv_obj_set_style_flex_main_place(lv_obj_t* obj, lv_flex_align_t value, lv_style_selector_t selector);
    void lv_obj_set_style_flex_cross_place(lv_obj_t* obj, lv_flex_align_t value, lv_style_selector_t selector);
    void lv_obj_set_style_flex_track_place(lv_obj_t* obj, lv_flex_align_t value, lv_style_selector_t selector);
    void lv_obj_set_style_flex_grow(lv_obj_t* obj, uint8_t value, lv_style_selector_t selector);

    static inline lv_flex_flow_t lv_obj_get_style_flex_flow(const lv_obj_t* obj, uint32_t part)
    {
        lv_style_value_t v = lv_obj_get_style_prop(obj, part, LV_STYLE_FLEX_FLOW);
        return (lv_flex_flow_t) v.num;
    }

    static inline lv_flex_align_t lv_obj_get_style_flex_main_place(const lv_obj_t* obj, uint32_t part)
    {
        lv_style_value_t v = lv_obj_get_style_prop(obj, part, LV_STYLE_FLEX_MAIN_PLACE);
        return (lv_flex_align_t) v.num;
    }

    static inline lv_flex_align_t lv_obj_get_style_flex_cross_place(const lv_obj_t* obj, uint32_t part)
    {
        lv_style_value_t v = lv_obj_get_style_prop(obj, part, LV_STYLE_FLEX_CROSS_PLACE);
        return (lv_flex_align_t) v.num;
    }

    static inline lv_flex_align_t lv_obj_get_style_flex_track_place(const lv_obj_t* obj, uint32_t part)
    {
        lv_style_value_t v = lv_obj_get_style_prop(obj, part, LV_STYLE_FLEX_TRACK_PLACE);
        return (lv_flex_align_t) v.num;
    }

    static inline uint8_t lv_obj_get_style_flex_grow(const lv_obj_t* obj, uint32_t part)
    {
        lv_style_value_t v = lv_obj_get_style_prop(obj, part, LV_STYLE_FLEX_GROW);
        return (uint8_t) v.num;
    }

    /**********************
     *      MACROS
     **********************/

#endif  /*LV_USE_FLEX*/

#ifdef __cplusplus
} /*extern "C"*/
#endif

#endif /*LV_FLEX_H*/
